import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.io.File;import javax.swing.JButton;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JLabel;@SuppressWarnings("serial")public class Filechooser extends JFrame implements ActionListener{	JButton open=null;	public static void main (String[] args){		new Filechooser();//构造一个指向用户的默认目录Filechooser	}	public Filechooser(){		open=new JButton("打开");		this.add(open);		this.setBounds(100,100,100,100);		this.setVisible(true);		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);		open.addActionListener(this);	}	public void actionPerformed(ActionEvent e){		JFileChooser j=new JFileChooser();		j.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);//设置Filechooser		j.showDialog(new JLabel(),"选择");// 弹出具有自己定义 approve button的自己定义文件选择器对话框		File file=j.getSelectedFile();			if(file.isDirectory()){				System.out.println("目录        "+file.getAbsolutePath());							}else if(file.isFile()){				System.out.println("目录        "+file.getAbsolutePath());			}			System.out.println(j.getSelectedFile().getName());			}}